dmk-business-logic
Explain the design rationale and domain concepts behind the Ledger Device Management Kit (DMK) API, including Clear Signing, Secure Channel, Ledger OS (BOLOS), Device Actions vs Commands, sessions, transports, derivation paths, and Genuine Check. Use when a developer asks 'what is X?' about a DMK concept, 'why does X work this way?' about an API design decision, or 'what's the difference between X and Y?' for DMK components.
93
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Does it follow best practices?
Impact
100%
1.12xAverage score across 3 eval scenarios
Advisory
Suggest reviewing before use
Security
2 findings — 2 medium severity. This skill can be installed but you should review these findings before use.
W012: Unverifiable external dependency detected (runtime URL that controls agent)
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
Potentially malicious external URL detected (high risk: 0.90). The skill explicitly opens a runtime WebSocket to wss://manager.live.ledger.com to establish a Secure Channel whereby Ledger's HSM can perform privileged operations and prompt the device (e.g., AllowSecureConnection), so this external endpoint is a required runtime dependency that can control device prompts/operations.
W009: Direct money access capability detected (payment gateways, crypto, banking)
What this means
The skill is specifically designed for direct financial operations, giving the agent the ability to move money or execute financial transactions — such as payment processing, cryptocurrency operations, banking integrations, or market order execution.
Why it was flagged
Direct money access detected (high risk: 1.00). This skill is explicitly about Ledger device integration and signer functionality for blockchain assets. It documents concrete APIs and builders (e.g., SignerEthBuilder, signer kit, dmk.executeDeviceAction(), dmk.sendCommand()) and explicitly describes signing transactions and obtaining addresses ("signing a transaction, getting an address", "all signer operations (sign, get address)"). Those are specific crypto wallet/signing capabilities that enable on-chain transactions (direct financial execution). Therefore it grants Direct Financial Execution Authority.
- Repository
- LedgerHQ/agent-skills
- Commit
c9739bb
- Audited
- Security analysis
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